ENOfficial
It was narrated that Ibn `Umar (رضي الله عنه) said: The Messenger of Allah (ﷺ)said: “Whoever buys foodstuff should not sell it until he takes possession of all of it.”
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا إِسْحَاقُ بْنُ عِيسَى، أَخْبَرَنَا مَالِكٌ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، رَضِيَ اللَّهُ عَنْهُ قَالَ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ مَنْ ابْتَاعَ طَعَامًا فَلَا يَبِعْهُ حَتَّى يَسْتَوْفِيَهُ.
sunnah.com